Edradour by a country mile, I've had 5 different bottles of the 10 yr old(4 were minis) and they range from crap to brilliant, 2 good ones , 2 bad ones , one ok one. It hasnt been a sulphur cask issue either.
The problem is a'bhunadh is a bad example, the distillery pics and chooses the best casks to make that expression and they have alot to choose from The rest gets married with other casks to make their other expressions. Edradour doesn't have that luxury. They have to bottle everything they make into their standard expression with just a few casks going to other bottlings. Now that they are making their peated version they have even fewer casks to choose from for their standard 10. I have been disappointed that they allow some of the bottles get out that they do, but business is business. The last few bottles I've tasted seem decent though so maybe that is a thing of the past.
Probably just a matter of time before they get some decent consistencey going.
Cooley were the same when they started. Eventhough a much bigger operation the Malt going into the likes of Tyrconnell were too young at the start. However they never really had an issue with soapiness which is the main factor that can put me off a dram.